I am shopping around for stiffer valvesprings for the future and I decided to go with Portflow inners and JDM ITR outers. These are for the intake side.

Anyway, my question is, what about the exhaust side? I can't find these for sale anywhere. Are the stocks fine for most applications?

Will I be fine throwing in Portflow inners and ITR outers and revving to say 9K?

I'm probably just missing something, it happens.

Thanks

 

Please reply...

 

9k should be fine. I would not go any higher though. Have you thought about going with some Crower Springs? They make an excellent spring and retainer.

 

I'm using CTR cams so I don't want to blow all my money on the springs (though they are important). I've heard the Portflow/JDM ITR valvesprings are great for CTR/ITR cams.

Anyway, what about exhaust valvesprings? What's the story with those?

 

can't you switch the ITR intake springs to the exhaust side?

Greg

 

Yeah, but if the stocks are fine then I won't bother. I am trying to stay on a budget so I don't want to spend if I don't have to.